For Class 1: no (if nothing has changed in your system
since your previous submission). For Class 2: yes
(even if nothing has changed from your previous submission).

In other words, winning submission in Class 1 from previous
year is still a winning submission for this year's edition
unless a better result is submitted or the system that
achieved the winning result has changed. Last year's
winning submission for Class 2 may win this year's
competition but will not do it automatically, it has to
be resubmitted.